WO2018056739A1 - Silencieux et procédé de maintien et de réparation de silencieux - Google Patents

Silencieux et procédé de maintien et de réparation de silencieux Download PDF

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Publication number
WO2018056739A1
WO2018056739A1 PCT/KR2017/010449 KR2017010449W WO2018056739A1 WO 2018056739 A1 WO2018056739 A1 WO 2018056739A1 KR 2017010449 W KR2017010449 W KR 2017010449W WO 2018056739 A1 WO2018056739 A1 WO 2018056739A1
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WO
WIPO (PCT)
Prior art keywords
sound
housing
absorbing
noise
cylinder
Prior art date
Application number
PCT/KR2017/010449
Other languages
English (en)
Korean (ko)
Inventor
박성종
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020160121909A external-priority patent/KR101834484B1/ko
Priority claimed from KR1020170111867A external-priority patent/KR102027262B1/ko
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to CN201780058604.3A priority Critical patent/CN109790768B/zh
Priority to JP2019516220A priority patent/JP6925415B2/ja
Publication of WO2018056739A1 publication Critical patent/WO2018056739A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly

Definitions

  • the present invention relates to a muffler and a maintenance method of the muffler.
  • Heating, ventilation, and air conditioning (HVAC) ducts can be used to transfer fluids for heating, ventilation, and cooling. By transferring the fluid through the duct, the fluid can be introduced into or out of the specific space.
  • HVAC Heating, ventilation, and air conditioning
  • the duct is equipped with a blower for fluid transport and the noise generated by the blower is transmitted through the fluid in the duct.
  • the diesel engine is driven by engine ignition, and the explosive sound is transmitted through the fluid in the exhaust pipe.
  • FIG. 1 is a view showing exhaust pipe noise of a conventional engine.
  • FIG. 1 the noise of the exhaust pipe is dominant in the low-frequency region as compared with the high-frequency region.
  • Conventional engine exhaust mufflers have a structure in which a sound absorbing material is applied inside a hollow cylinder or a sound absorbing baffle is installed.
  • the conventional exhaust pipe silencer having the above structure is effective in reducing the noise in the high frequency range of FIG. 1, but is vulnerable to reducing the noise in the low frequency range.
  • a problem to be solved by the present invention is to provide a noise reduction device.
  • a muffler comprising: a muffler having a hollow housing coupled to a muffler, and a muffler disposed in the muffler to extend in the longitudinal direction of the muffler,
  • the sound-absorbing device includes a plurality of sound-absorbing units coupled to each other in the longitudinal direction of the housing and reducing noise.
  • the noise generating unit includes a pipe.
  • the sound-absorbing unit uses Helmholtz resonance to reduce noise.
  • the sound-absorbing unit is flange-coupled to another neighboring sound-absorbing unit.
  • the sound-absorbing unit includes a Helmholtz resonator which is mutually coupled adjacent to each other circumferentially on the transverse plane of the housing.
  • a sound absorbing material is formed on the inner surface of the Helmholtz resonator.
  • the sound-absorbing unit reduces the noise of the same or different range band as that of the neighboring sound-absorbing unit.
  • a horn-shaped guide member is provided at the front end and the rear end of the sound-absorbing device, respectively.
  • a sound absorbing material is formed on the inner surface of the housing.
  • the sound-absorbing unit includes a plurality of resonance spaces divided into partitions, and a resonance hole communicating with the resonance space is formed on an outer circumferential surface of the sound-absorbing unit.
  • the noise generating portion includes a duct, and the duct includes at least one manhole communicating with the housing.
  • the duct includes an upper duct and a lower duct respectively connected to upper and lower portions of the housing, and the manhole is formed in the upper duct and the lower duct, respectively.
  • a muffler comprising: a hollow housing communicating with a duct; a muffler housing the muffler housing the muffler; And a control unit for controlling the frequency of the reversed-phase sound.
  • the sound absorbing apparatus includes a hollow cylinder, a closed cap for sealing one open side of the cylinder, an open cap spaced apart from the other open side of the cylinder, and an open cap provided inside the cylinder, And a reflector that reflects the sound waves introduced into the interior.
  • a position adjusting rod connected to the reflection plate, wherein the adjusting device adjusts the position of the reflection plate in the cylinder by applying a force to the position adjusting rod.
  • the position adjusting rod includes a rack gear
  • the adjusting device includes a pinion gear
  • the sound absorbing device includes a hollow cylinder, first and second open caps spaced apart from both open sides of the cylinder, and first and second open caps disposed inside the cylinder and reflecting the sound waves introduced into the cylinder, 1 and a second reflector.
  • An aspect of a muffler maintenance method includes opening an upper manhole and a lower manhole respectively formed in an upper duct and a lower duct connected to upper and lower portions of a hollow housing, A step of connecting a winch to a sound absorbing device installed in the housing through the upper manhole in a longitudinal direction of the housing; separating the sound absorbing device and the housing; lowering the sound absorbing device; And repairing the sound absorbing device through the lower manhole.
  • the sound-absorbing device includes a plurality of sound-absorbing units connected to each other in the longitudinal direction of the housing.
  • the method for maintaining the silencer further includes separating the sound-absorbing unit and discharging the sound-absorbing unit through the lower manhole.
  • FIG. 1 is a view showing exhaust pipe noise of a conventional engine.
  • FIG. 2 is a front view showing an incision of a housing portion of a silencer according to an embodiment of the present invention.
  • FIG. 3 is a perspective view of the sound-absorbing unit of the muffler shown in Fig.
  • Fig. 4 is a cross-sectional view of the sound-absorbing unit of the muffler shown in Fig. 3;
  • FIG. 5 is a flowchart illustrating a maintenance method of a muffler according to an embodiment of the present invention.
  • FIG. 6 is a view illustrating each process of the silencer maintenance method according to the first embodiment of the present invention.
  • FIG. 7 is a view illustrating each process of the maintenance method of the silencer according to the second embodiment of the present invention.
  • FIG. 8 is a perspective view of a muffler according to another embodiment of the present invention.
  • FIG. 9 is a partial longitudinal cross-sectional view of a muffler according to another embodiment of the present invention.
  • FIG. 10 is a sectional view taken along the line AA in Fig.
  • FIG. 11 is an enlarged view of a portion B in Fig.
  • FIG. 12 is a view showing a modification of the housing of Fig.
  • FIG. 13 is a cross-sectional view of a muffler according to another embodiment of the present invention.
  • FIG. 14 is an exploded perspective view of a muffler according to another embodiment of the present invention.
  • FIG. 15 is a perspective view of the silencer shown in Fig.
  • FIG. 16 is an exploded perspective view of the sound absorbing device shown in Fig.
  • FIG. 17 is a cross-sectional view of the sound absorbing device shown in Fig.
  • FIG. 18 is a cross-sectional view of the muffler shown in Fig.
  • 19 and 20 are views showing that the reflector of the silencer shown in Fig. 14 moves in the cylinder.
  • 21 is a cross-sectional view of a muffler according to another embodiment of the present invention.
  • FIG. 22 is a view showing a sound absorbing device according to another embodiment of the present invention.
  • 23 and 24 are sectional views of a muffler according to another embodiment of the present invention.
  • the silencer 100 is an apparatus for reducing noise, and is installed and used in a noise generating unit where noise is generated.
  • the noise generating unit may be a duct such as an exhaust port or a ventilator.
  • the housing 110 is formed in the noise generating portion where the noise is generated, and the sound absorbing device 120 is formed inside the housing 110, so that the noise can be effectively reduced.
  • the sound-absorbing device 120 may be composed of a plurality of sound-absorbing units 121. Therefore, when the sound absorbing device 120 is cleaned or repaired, the maintenance work can be performed very conveniently.
  • FIG. 1 the silencer according to one embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.
  • FIG. 1
  • FIG. 3 is a perspective view of the sound-absorbing unit shown in Fig. 2
  • Fig. 4 is a perspective view of the sound-absorbing unit of the silencer shown in Fig. 3, and Fig. Sectional view.
  • the silencer 100 may include the housing 110 and the sound absorbing device 120.
  • the housing 110 is hollow and can communicate with the ducts 10a and 10b.
  • the sound absorbing unit 120 may be detachably coupled to the inside of the housing 110 and may include a plurality of sound absorbing units 121 connected to the longitudinal direction of the housing 110.
  • the ducts 10a and 10b are connected to the exhaust port where noises are generated and the exhaust gas and noise move.
  • the ducts 10a and 10b may be coupled to the housing 110.
  • the ducts 10a and 10b are composed of an upper duct 10a and a lower duct 10b connected to the upper end and the rear end of the housing 110, respectively.
  • Manholes 11a and 11b communicating with the housing 110 may be formed in the ducts 10a and 10b, which will be described later in more detail.
  • the housing 110 is fixed between the upper duct 10a and the lower duct 10b and is formed in a hollow shape interlocking with the ducts 10a and 10b.
  • the housing 110 is not limited to the hollow shape, but may have a cross section of various shapes such as a quadrangle. Noise can flow into the interior of the housing 110 through the vent and the duct 20. Absorbing material 140a provided on the inner peripheral surface of the housing 110 and the sound-absorbing device 120 provided inside the housing 110 are absorbed.
  • the sound-absorbing device 120 is a device for reducing the noise of the exhaust port.
  • the sound-absorbing device 120 is formed at an inner central portion of the housing 110 in a longitudinal direction of the housing 110.
  • the fixing unit 127 formed at both ends of the sound absorbing device 120 may be detachably coupled to the fixing hole 128 formed in the housing 110 and the bolting part 150.
  • the manner in which the housing 110 and the sound absorbing device 120 are coupled may be variously determined by bolts, pins, rivets, or the like.
  • the noise introduced into the housing 110 moves in the longitudinal direction of the housing 110 and is absorbed by the sound-absorbing device 120 and can be effectively reduced.
  • the sound-absorbing device 120 is formed by connecting a plurality of separate sound-absorbing units 121.
  • the sound-absorbing unit 121 is a unit constituting the sound-absorbing device 120, and a plurality of the sound-absorbing units 121 are connected to form the sound-absorbing device 120.
  • the sound absorption unit 121 may have flanges 122 at the upper and lower ends thereof and the flanges 122 of the adjacent sound absorption units 121 may be coupled to each other using the coupling member 123.
  • Bolts, fins, and the like may be used as coupling means between the flanges 122 of the adjacent sound-absorbing unit 121, but are not limited thereto. Since the plurality of sound absorption units 121 are combined to constitute the sound absorption apparatus 120, the manufacture and maintenance of the sound absorption apparatus 120 can be easily performed.
  • the sound-absorbing unit 121 may be divided into partitions to form a plurality of resonance spaces 126.
  • a resonance hole 124 communicating with the resonance space 126 may be formed on the outer circumferential surface of the sound absorption unit 121. That is, the sound-absorbing unit 121 may include a plurality of Helmholtz resonators forming a resonance space 126 adjacent to each other circumferentially on the cross-section of the housing 110.
  • the Helmholtz resonator is a device composed of a closed space with a small hole.
  • a standing wave enters a resonator through a small hole, it can be used as a new reversed phase type of vibration of the standing wave and calculated out of the resonator, so that a phase shift occurs at a specific frequency and a specific standing wave disappears.
  • the sound-absorbing unit 121 can effectively reduce the noise of the exhaust air flowing into the housing 110 on the cross-section of the housing 110.
  • the sound-absorbing unit 121 may include a plurality of Helmholtz resonators.
  • a sound absorbing material 140b may be formed on the outer surface of the sound absorbing unit 121 and a sound absorbing material guide 125 for fixing the sound absorbing material 140b may be formed.
  • the sound absorbing material guide 125 fixes the sound absorbing material 140b formed on the outer surface of the sound absorbing unit 121 and prevents the sound absorbing material 140b from coming off.
  • the sound-absorbing device 120 has a structure that can be repaired by exposing the ducts 10a and 10b through the manholes 11a and 11b to be described later.
  • the manholes 11a and 11b may include a top manhole 11a and a bottom manhole 11b.
  • the upper and lower manholes 11a and 11b are formed in the upper and lower ducts 10a and 10b communicating with the housing 110.
  • the sound-absorbing device 120 includes the housing 110 and the ducts 10a and 10b, 10b and may be exposed or discharged through the manholes 11a, 11b.
  • the sound-absorbing device 120 can be moved to the positions of the manholes 11a and 11b in order to clean the sound-absorbing device 120 or to repair each sound-absorbing unit 121. [ At this time, it is possible to move the sound-absorbing device 120 by connecting the hooks 129 formed at both ends of the sound-absorbing device 120 to the wires 21 of the winch part 20.
  • the sound-absorbing device 120 may be connected to the wire 21 of the winch portion 20 and move to the positions of the manholes 11a and 11b.
  • a foreign matter such as soot may be generated in the sound-absorbing device 120 formed in the air outlet.
  • the sound absorbing device 120 having such a foreign substance can be moved to the position of the lower manhole 11b by using the winch portion 20.
  • the user can open the cover 12 of the manholes 11a and 11b and remove foreign matter from the sound-absorbing device 120.
  • each sound-absorbing unit 121 can be repaired or replaced.
  • the manholes 11a and 11b can be opened and used only when necessary.
  • the buffer member 130 may be formed at both ends of the sound-absorbing device 120 to protect the sound-absorbing device 120 when the sound-absorbing device 120 is moved to the positions of the manholes 11a and 11b.
  • the buffering member 130 may be formed at both ends of the sound absorbing apparatus 120 and when the sound absorbing apparatus 120 is moved to the positions of the manholes 11a and 11b to maintain and repair the sound absorbing apparatus 120, And may be provided to prevent collision between the housings 110.
  • FIG. 5 the maintenance method of the muffler according to the first embodiment of the present invention will be described in detail with reference to FIGS. 5 to 6.
  • FIG. 5 the maintenance method of the muffler according to the first embodiment of the present invention will be described in detail with reference to FIGS. 5 to 6.
  • FIG. 5 is a flowchart showing a maintenance method of the silencer
  • FIG. 6 is a view illustrating each process of the silencer maintenance method according to the first embodiment of the present invention.
  • the manholes 11a and 11b of the muffler 100 are opened (S161).
  • the cover 12 is opened. Since the manholes 11a and 11b and the lid 12 are bolted to each other, the user can remove the bolt and open the lid 12 of the manholes 11a and 11b.
  • the winch unit 20 is connected to the sound-absorbing device 120 (S162).
  • the winch part 20 is connected to the sound absorbing device 120 in which a plurality of sound absorbing units 121 are connected in the longitudinal direction of the housing 110 through the upper manhole 11a as shown in FIG. do. That is, the user can connect the wire 21 of the winch unit 20 to the hook 129 formed at the upper end of the sound-absorbing device 120.
  • the winch portion 20 is installed outside the muffler 10 and the wire 21 wound around the winch portion 20 can be fixed to the ring portion 129 of the sound absorbing device 120.
  • the housing 110 and the sound-absorbing device 120 are separated (S163). That is, as shown in FIG. 6 (c), the bolts of the bolting part 11 provided at both ends of the sound absorbing device 120 are removed. At this time, when the bolt is removed, the sound-absorbing device 120 is not connected to the housing 110 but is located inside the housing 110 by the connection of the winch portion 20.
  • the winch portion 20 of the sound absorbing device 120 is loosened so that the sound absorbing device 120 can be lowered (S164).
  • the winch portion 20 is used and the sound absorbing device 120 is lowered to the lower duct 10b where the manhole 21 is located as shown in FIG. 6 (d-1)
  • the sound-absorbing unit 121 can be moved while being cleaned.
  • the user can clean the sound-absorbing unit 121 by intermittently lowering the sound-absorbing device 120 while loosening the winch portion 20.
  • the sound-absorbing unit 121 may be lowered and the next sound-absorbing unit 121 may be cleaned or repaired ( S166). The above process is repeated so that the foreign matter caught by the neck 124 of the sound absorption unit 121 can be removed.
  • FIG. 7 is a view illustrating each process of the maintenance method of the silencer according to the second embodiment of the present invention.
  • the maintenance method of the muffler 100 according to the second embodiment of the present invention is substantially the same as the first embodiment already described except for the step S165 in which the sound absorption unit 121 is discharged. Therefore, the maintenance methods already described are denoted by the same reference numerals, and a detailed description thereof will be omitted.
  • the maintenance method of the silencer 100 according to the second embodiment of the present invention is such that the sound absorption apparatus 120 descends to the position of the lower manhole 11b and then the sound absorption unit 121 is discharged from the lower manhole 11b (S165).
  • the engaging member 123 of the sound-absorbing unit 121 is removed from the sound-absorbing device 120 lowered to the position of the lower manhole 11b, And discharged to the outside via the lower manhole 11b.
  • the user can take out the sound absorption unit 121 to the outside and repair each sound absorption unit 121 or replace the failed sound absorption unit 121.
  • the entire part of the sound-absorbing device 120 is not replaced and each part of the sound-absorbing unit 121 is replaced or repaired, so that the maintenance can be easily performed.
  • the present invention effectively reduces the noise by forming the sound absorbing device 120 in the structure of the unit and the manholes 11a and 11b formed in the ducts 10a and 10b and the maintenance of the silencer 100 is convenient.
  • FIG. 8 to 22 a muffler according to another embodiment of the present invention will be described with reference to FIGS. 8 to 22.
  • FIG. The muffler according to another embodiment can also be maintained in the manner shown in Figs.
  • FIG. 9 is a partial vertical cross-sectional view of a muffler according to another embodiment of the present invention
  • FIG. 10 is a cross-sectional view taken along line AA of FIG. 9
  • FIG. 11 is a cross- 9 is an enlarged view of a portion B in Fig.
  • the muffler 200 includes a housing 210 and a sound absorbing device 220, and is combined with a noise generator (not shown) to reduce the noise of the noise generator.
  • the noise generating portion may be a pipe.
  • the piping can be used as an exhaust pipe or the like, but is not limited thereto.
  • the noise generating unit to which the silencer 200 according to the present embodiment is applied is an exhaust pipe.
  • the exhaust pipe coupled with the silencer 200 is mainly dominated by the low-frequency noise component, and the silencer 200 has a structure for reducing the low-frequency noise component of the exhaust pipe.
  • the housing 210 is coupled to the exhaust pipe.
  • the housing 210 according to the present embodiment may be flanged to the exhaust pipe.
  • the housing 210 has a hollow shape. The exhaust pipe noise flows into the housing 210.
  • the housing 210 may have a circular cross section as shown in FIG.
  • the housing 210 may have a rectangular cross-section as shown in FIG. 12 is a view showing a modification of the housing 210 of FIG.
  • the housing may have various cross-sectional shapes.
  • a sound absorbing material 211 may be formed on the inner surface of the housing 210.
  • the sound absorbing material 211 formed on the inner surface of the housing 210 absorbs high-frequency components of the exhaust pipe noise and converts the noise into heat, thereby reducing noise.
  • a sound absorbing device 220 is disposed inside the housing 210.
  • the sound absorbing device 220 can reduce the low frequency component of the exhaust pipe noise.
  • the sound absorbing device 220 may be disposed in an inner central region of the housing 210 and may be disposed apart from the inner side of the housing 210.
  • the sound-absorbing device 220 may be supported on the inner surface of the housing 210 by a separate support member (not shown).
  • the sound absorbing device 220 is formed to extend in the longitudinal direction of the housing 210.
  • the noise of the exhaust pipe flowing into the housing 210 moves in the longitudinal direction of the housing 210 and is absorbed by the sound absorbing device 220 and can be effectively reduced.
  • the sound absorbing apparatus 220 includes a plurality of sound absorbing units 230 that are coupled to each other in the longitudinal direction of the housing 210 and reduce noise using Helmholtz resonance.
  • Helmholtz resonance it is possible to effectively absorb the low frequency component of the exhaust pipe noise.
  • the sound-absorbing unit 230 can be flanged to the neighboring other sound-absorbing unit 230.
  • the flange 231 is formed at both ends of the sound-absorbing unit 230 and the flange 231 of the adjacent sound-absorbing unit 230 can be coupled to each other by the bolts B and the nuts N.
  • the sound-absorbing unit 230 has a structure in which the sound-absorbing unit 230 is flange-coupled to the other sound-absorbing unit 230 as described above, it is easy to manufacture and maintain the sound-absorbing device 220.
  • the sound-absorbing unit 230 may include a plurality of Helmholtz resonators 240 that are mutually coupled to each other circumferentially on the cross-section of the housing 210 as shown in FIG.
  • Helmholtz resonator 240 resonates the air at a specific frequency to absorb sound.
  • the Helmholtz resonator 240 may have a narrow jar shape.
  • These Helmholtz resonators 240 are coupled to each other adjacent to each other in a clockwise or counterclockwise direction on the cross section of the housing 210.
  • the sound-absorbing unit 230 can effectively absorb the noise of the exhaust pipe flowing into the housing 210 on the cross-section of the housing 210.
  • the sound-absorbing unit 230 may have a circular cross-section corresponding to the housing 210 having a circular cross-section.
  • the sound-absorbing unit 260 may have a rectangular cross-section corresponding to the housing 250 having a rectangular cross-section.
  • a sound absorbing material 251 may be provided on the inner surface of the housing 250.
  • a sound absorbing material 241 may be formed on the outer surface of the Helmholtz resonator 240. In this case, the noise reduction performance of the Helmholtz resonator 240 can be improved.
  • the sound-absorbing unit may be composed of a single Helmholtz resonator.
  • the sound-absorbing unit 230 can reduce the noise of the same or different range band as that of the neighboring sound-absorbing unit 230.
  • the sound absorption unit 230 can reduce the noise of all the different frequency bands.
  • the sound-absorbing unit 230 can reduce the noise of the same band.
  • the sound-absorbing unit 230 may belong to any one of a plurality of groups classified by the band of the noise to be reduced, and each group may be disposed adjacent to another group in the longitudinal direction of the housing 210.
  • horn-shaped guide members 271 and 272 are respectively provided at the front end of the sound-absorbing device 220 near the inlet end of the housing 210 and at the rear end of the sound-absorbing device 220 near the outlet end of the housing 210, Can be installed.
  • the guide member 271 provided at the front end of the sound absorbing device 220 guides the air introduced into the inlet end of the housing 210 to spread evenly over the cross section of the housing 210.
  • the guide member 272 provided at the rear end of the sound absorbing device 220 guides the noise of the exhaust pipe moving inside the housing 210 to be smoothly discharged through the outlet end of the housing 210.
  • a sound absorbing material (not shown) may be formed on the outer surfaces of the guide members 271 and 272.
  • the sound absorption unit 230 constituting the silencer 200 reduces the low-frequency noise of the exhaust pipe using Helmholtz resonance.
  • the silencer 200 may be applied to piping used for other purposes besides the exhaust pipe.
  • the sound-absorbing unit constituting the silencer 200 can reduce the noise of the pipe in a manner other than the Helmholtz resonance according to the noise characteristics of the pipe. Even in this case, the pipe noise introduced into the housing 210 can be effectively reduced by the sound-absorbing unit mutually coupled in the longitudinal direction of the housing 210.
  • FIG. 13 is a cross-sectional view of a muffler according to another embodiment of the present invention.
  • the muffler 201 may include a housing 210, a sound absorbing device 220, and a side branch resonator 280.
  • the hollow housing 210 may be flanged to the exhaust pipe.
  • the exhaust pipe noise may be introduced into the housing 210.
  • the sound absorbing device 220 may be provided inside the housing 210.
  • the sound absorbing device 220 can reduce the low frequency component of the exhaust pipe noise.
  • the sound-absorbing device 220 may include a plurality of sound-absorbing units 230. Since the housing 210 and the sound absorbing device 220 have been described above, a detailed description thereof will be omitted.
  • the side branch resonator 280 may be formed along the inner surface of the housing 210.
  • the side branch resonator 280 serves to reduce the noise introduced into the housing 210.
  • the side branch resonator 280 may include a cylinder 281.
  • the cylinder 281 may be formed along the inner surface of the housing 210.
  • a resonance space 282 may be formed between the cylinder 281 and the housing 210.
  • the noise introduced into the housing 210 flows into the resonance space 282 through the resonance hole 283 formed in the cylinder 281 and is converted and the converted sound wave flows out through the resonance hole 283, Can be canceled.
  • a sound absorbing material 281a may be provided on one side of the cylinder 281 facing the sound absorbing device 220.
  • the noise absorbing material 281a can reduce a part of the noise introduced into the housing 210.
  • FIG. 14 is an exploded perspective view of a silencer according to another embodiment of the present invention
  • FIG. 15 is a perspective view of the silencer shown in FIG.
  • a silencer 300 includes a housing 310, a sound absorbing device 320, and a regulating device 330.
  • the housing 310 is hollow and can communicate with the duct. Accordingly, the fluid conveyed through the duct can be conveyed through the hollow hole H1 of the housing 310.
  • the housing 310 is composed of a body 311 and a flange 312.
  • a hollow hole H1 may be formed in the body 311.
  • the flange 312 may be formed along the edges of both open sides of the housing 310.
  • the flange 312 may be used for coupling with the duct.
  • the flange 312 may be bolted to the duct. As the flange 312 is coupled with the duct, the housing 310 and the duct can communicate with each other.
  • the sound absorbing device 320 is provided inside the housing 310 to reduce noise caused by the fluid introduced into the housing 310.
  • the sound-absorbing device 320 according to the embodiment of the present invention can reduce the noise by generating a reverse sound of noise having a specific frequency among noise introduced into the housing 310.
  • the sound-absorbing device 320 generates a negative-phase sound due to the noise inside the housing 310, and the sound-absorbing device 320 can control the frequency of the negative-phase sound. Accordingly, the noise corresponding to the frequency of the reverse-phase sound output by the sound-absorbing device 320 can be intensively reduced.
  • Sound absorbing device 320 may include engagement lug 326.
  • the engaging lug 326 may be bolted to the fixing lug 313 provided inside the housing 310.
  • the engaging lug 326 may be formed protruding outward of the sound absorbing device 320 and the fixing lug 313 of the housing 310 may be provided at a coupling position with the engaging lug 326.
  • the sound absorbing device 320 can be kept spaced apart from the inner surface of the housing 310 by a certain distance do.
  • the fluid introduced into the housing 310 can be transferred through the space formed between the outer surface of the sound absorbing device 320 and the inner surface of the housing 310.
  • the adjusting device 330 adjusts the frequency of the negative-phase sound.
  • the sound absorption apparatus 320 is provided with a reflection plate 324 (see FIG. 16) for reflecting the sound waves.
  • the position of the reflection plate 324 is changed by the adjustment device 330 so that the frequency of the sound waves can be adjusted. A detailed description of the change of the position of the reflection plate 324 by the adjustment device 330 will be given later with reference to FIG. 19 and FIG.
  • the adjustment device 330 may include a handle 331 and a pinion gear 332.
  • the pinion gear 332 may protrude outward from one side of the handle 331.
  • the pinion gear 332 may be inserted into the housing 310 and the handle 331 may be provided outside the housing 310.
  • the housing 310 may be provided with an insertion hole.
  • the pinion gear 332 By rotating the knob 331, the pinion gear 332 can be rotated.
  • the pinion gear 332 can be used to adjust the position of the position adjusting rod 325 by gearing with a position adjusting rod 325 (see FIG. 16) connected to the reflecting plate 324 of the sound absorbing device 320.
  • the position of the position adjusting rod 325 is changed by the pinion gear 332 so that the position of the reflection plate 324 in the sound absorption apparatus 320 can be changed.
  • FIG. 16 is an exploded perspective view of the sound absorbing apparatus shown in FIG. 14, and FIG. 17 is a sectional view of the sound absorbing apparatus shown in FIG.
  • the sound-absorbing device 320 includes a cylinder 321, a sealed cap 322, an open cap 323, a reflector 324, and a positioning rod 325.
  • the cylinder 321 may have a hollow hole H2.
  • the cylinder 321 may have a shape corresponding to the inside of the housing 310.
  • the cylinder 321 may have a cylindrical shape.
  • a sound absorbing material 321a may be provided on the outer surface of the cylinder 321.
  • the fluid introduced into the housing 310 is conveyed through a space formed between the outer surface of the sound absorbing device 320 and the inner surface of the housing 310.
  • the noise absorbed by the sound absorbing material 321a provided in the cylinder 321 Can be reduced.
  • the hermetic cap 322 seals the open side of the cylinder 321 (hereinafter referred to as the first open side).
  • the cylinder 321 includes two open faces, the first open face of which can be sealed by a closed cap 322.
  • the open cap 323 may be disposed apart from the other open side of the cylinder 321 (hereinafter referred to as the second open side).
  • the inner space of the cylinder 321 can be connected to the outside as the open cap 323 is disposed apart from the second opening.
  • the hermetic cap 322 and the open cap 323 may be provided with engagement lugs 326.
  • the engaging lug 326 may be coupled to the securing lug 313 of the housing 310 and used to secure the sound-absorbing device 320 to the housing 310, as described above.
  • the noise generated inside the housing 310 may be introduced into the cylinder 321 through the second opening.
  • the noise introduced into the cylinder 321 may be reflected on the inner surface of the cylinder 321 to be converted into a reverse-phase sound, and the reverse-phase sound may flow out through the second opening.
  • the reversed phase noise generated in this manner can attenuate the noise generated inside the housing 310.
  • the reflection plate 324 is provided inside the cylinder 321 and reflects the sound wave introduced into the cylinder 321.
  • the sound wave introduced into the cylinder 321 can be reflected not only on the inner surface of the cylinder 321 but also on the reflection plate 324. [
  • the sound waves reflected on the inner surface of the cylinder 321 and the reflection plate 324 can be converted into the negative phase of the noise.
  • the position of the reflection plate 324 inside the cylinder 321 can be adjusted.
  • the distance between the reflection plate 324 and the second opening face is changed.
  • the frequency of the reverse phase sound may be changed.
  • a position adjustment rod 325 may be provided on the reflection plate 324 for adjusting the position of the reflection plate 324.
  • the position adjustment rod 325 may be formed long in the direction of transport of the fluid and fixed to the reflection plate 324.
  • the adjustment device 330 described above can adjust the position of the reflection plate 324 inside the cylinder 321 by applying a force to the position adjustment rod 325.
  • the position adjusting rod 325 may include a rack gear.
  • the rack gear can be gear-engaged with the pinion gear 332 of the regulating device 330.
  • the position adjusting rod 325 can be changed in position in the longitudinal direction by the rotation of the pinion gear 332.
  • the position of the reflection plate 324 in the cylinder 321 can be adjusted as the position of the position adjustment rod 325 is changed.
  • FIG. 18 is a cross-sectional view of the silencer shown in Fig.
  • the sound absorbing device 320 may be provided inside the housing 310.
  • the engaging lug 326 of the sound absorbing device 320 and the fixing lug 313 of the housing 310 are bolted together so that the sound absorbing device 320 can be fixed to the housing 310.
  • the engaging lug 326 protrudes toward the outer side of the sound absorbing device 320 and the fixing lug 313 protrudes toward the inner side of the housing 310 so that the sound absorbing device 320 contacts the inner surface of the housing 310 So that the separated state can be maintained.
  • Sound absorbing materials 311a and 321a may be provided on the inner surface of the housing 310 and the outer surface of the cylinder 321. Noises caused by the fluid that transfers the interior of the housing 310 can be reduced by the sound absorbing materials 311a and 321a.
  • a sound absorbing material 323a may be provided on the inner surface of the open cap 323.
  • the sound absorbing material 323a functions to absorb a part of the reverse sound emitted through the second open face of the cylinder 321.
  • the noise generated inside the housing 310 can be introduced into the cylinder 321 through the second open face of the cylinder 321.
  • the incoming noise can be converted into a reversed phase sound having a phase opposite to the phase of the noise by being reflected inside the cylinder 321.
  • the antiphase sound flows out to the outside again through the second side, and the discharged antiphase sound can collide with the noise to attenuate the magnitude of the noise.
  • the pinion gear 332 and the positioning rod 325 can be gear-engaged in the housing 310. [ Accordingly, as the pinion gear 332 rotates, the position of the position adjusting rod 325 can be changed. Specifically, by rotation of the pinion gear 332, the position adjusting rod 325 can be displaced in parallel to the fluid transport direction.
  • 19 and 20 are views showing that the reflector of the silencer shown in Fig. 14 moves in the cylinder.
  • the position of the reflection plate 324 inside the cylinder 321 can be adjusted.
  • the position of the reflection plate 324 can be adjusted by changing the position of the position adjustment rod 325. [ Specifically, the reflection plate 324 can be positioned parallel to the direction of transport of the fluid inside the housing 310.
  • the noise introduced into the cylinder 321 is reflected by the inner wall of the cylinder 321 and the reflection plate 324 and is converted into the reversed phase sounds SW1 and SW2. As the position of the reflection plate 324 is changed, SW1, and SW2 may be changed.
  • the user can adjust the position of the reflection plate 324 by rotating the pinion gear 332 using the handle 331. [ As the position of the reflection plate 324 is adjusted, the reversed phase sounds SW1 and SW2 having different frequencies are generated, and the noise of the corresponding frequency can be intensively attenuated. For example, the user can adjust the position of the reflector 324 to attenuate noise having the largest magnitude of the currently generated noise.
  • 21 is a cross-sectional view of a muffler according to another embodiment of the present invention.
  • the silencer 400 includes a housing 400, a sound absorbing device 420, and regulating devices 430a and 430b.
  • the housing 410 is hollow and can communicate with the duct.
  • the sound-absorbing device 420 may be provided inside the housing 410 to reduce noise due to the fluid introduced into the housing 410.
  • the adjusters 430a and 430b adjust the frequency of the reversed-phase sound.
  • the shape and function of the housing 410, the sound absorbing device 420 and the adjusting devices 430a and 430b are the same or similar to those of the housing 310, the sound absorbing device 320 and the adjusting device 330 The difference will be mainly explained.
  • the sound absorbing device 420 includes a cylinder 421, a first open cap 422a, a second open cap 422b, a first reflector 423a, a second reflector 423b, a first locating rod 424a, And a second positioning rod 424b.
  • the cylinder 421 may have a hollow hole.
  • the cylinder 421 may have a shape corresponding to the inside of the housing 410.
  • the first open cap 422a and the second open cap 422b may be disposed apart from each other at one open side (first open side and second open side) of the cylinder 421. [ Since the first open cap 422a and the second open cap 422b are disposed apart from the first open face and the second open face, respectively, the inner space of the cylinder 421 can be connected to the outside.
  • the first open cap 422a and the second open cap 422b may be provided with engagement lugs.
  • the engaging lug may be coupled to a securing lug of the housing 410 and used to secure the sound-absorbing device 420 to the housing 410.
  • the noise generated inside the housing 410 may be introduced into the cylinder 421 through the first opening face and the second opening face.
  • the noise introduced into the cylinder 421 may be reflected by the inner surface of the cylinder 421 and converted into a reversed-phase sound, and the reversed-phase sound may flow out through the second facing surface.
  • the reversed phase noise generated in this manner can attenuate the noise generated inside the housing 410.
  • the first reflector 423a and the second reflector 423b are provided inside the cylinder 421 to reflect the sound waves flowing into the cylinder 421. [ The sound waves flowing into the cylinder 421 can be reflected not only on the inner surface of the cylinder 421 but also on the first reflector 423a and the second reflector 423b.
  • the noise introduced into the first surface may be reflected by the inner surface of the cylinder 421 and the first reflector 423a to be converted into a negative image of noise.
  • the noise introduced into the second opening may be reflected to the inner surface of the cylinder 421 and the second reflecting plate 423b to be converted into a negative-going negative sound.
  • the positions of the first reflection plate 423a and the second reflection plate 423b in the cylinder 421 can be adjusted.
  • the distance between the first reflector 423a and the first obverse surface is different, or the distance between the second reflector 423b and the second obverse surface is It can be different.
  • the frequency of the reversed-phase sound may vary.
  • a first position adjusting rod 424a and a second position adjusting rod 424b are provided on the first and second reflecting plates 423a and 423b for adjusting the positions of the first and second reflecting plates 423a and 423b Respectively.
  • the first position adjusting rod 424a and the second position adjusting rod 424b may be elongated in the fluid transport direction and fixed to the first reflector 423a and the second reflector 423b, respectively.
  • the regulating devices 430a and 430b may include a first regulating device 430a and a second regulating device 430b.
  • the first adjusting device 430a can adjust the position of the first reflecting plate 423a in the cylinder 421 by applying a force to the first positioning rod 424a.
  • the second adjusting device 430b can adjust the position of the second reflecting plate 423b inside the cylinder 421 by applying a force to the second positioning rod 424b.
  • the first positioning rod 424a and the second positioning rod 424b may include rack gears.
  • the rack gear can be gear-engaged with the pinion gears of the regulating devices 430a and 430b. Since the operation relationship between the rack gear and the pinion gear has been described above, a detailed description thereof will be omitted.
  • the positions of the first reflection plate 423a and the second reflection plate 423b in the cylinder 421 can be independently determined. Accordingly, the reversed phase sound having different frequencies can be leaked through the first opening face and the second opening face.
  • FIG. 22 is a view showing a sound absorbing device according to another embodiment of the present invention.
  • the sound absorbing apparatus 500 includes a cylinder 510 and a hermetic cap 520.
  • the cylinder 510 may have a hollow hole.
  • the cylinder 510 may have a shape corresponding to the inside of the housing.
  • the surface of the cylinder 510 may be provided with a resonance hole RH connected to an internal hollow hole.
  • a partition wall is provided inside the cylinder 510, and a resonance space corresponding to the resonance hole RH can be formed by the partition. That is, one resonance space corresponding to one resonance hole RH can be formed.
  • Noise can enter the resonance cavity through the resonance hole (RH).
  • the incoming noise is reflected in the resonance space and converted to a reverse-phase sound, and the reverse-phase sound can be leaked out through the resonance hole (RH).
  • the hermetic cap 520 serves to seal both open sides of the cylinder 510.
  • the cylinder 510 includes two openings, two of which can be closed by a hermetic cap 520.
  • the inside of the cylinder 510 can be connected to the outside only through the resonance hole RH.
  • the sound absorbing apparatus 500 shown in FIG. 22 may include a Helmholtz resonator.
  • 23 and 24 are sectional views of a muffler according to another embodiment of the present invention.
  • the silencer 600 includes a housing 610, sound-absorbing devices 320 and 500, and a regulating device 620.
  • the housing 610 is hollow and can communicate with the duct.
  • the sound absorbing devices 320 and 500 are installed inside the housing 610 to reduce noise caused by the fluid introduced into the housing 610.
  • the housing 610 may be provided with a sound absorbing apparatus 320 (hereinafter referred to as a first sound absorbing apparatus) 320 shown in FIG. 16 and a sound absorbing apparatus (hereinafter referred to as a second sound absorbing apparatus) have.
  • a sound absorbing apparatus 320 hereinafter referred to as a first sound absorbing apparatus
  • a sound absorbing apparatus hereinafter referred to as a second sound absorbing apparatus
  • the first sound absorbing device 320 may include a reflection plate 324 to emit a reverse sound having a different frequency.
  • the second sound absorbing device 500 may be a Helmholtz resonator.
  • the adjusting device 620 controls the frequency of the reverse-phase sound flowing out from the first sound-absorbing device 320.
  • the first sound absorbing apparatus 320 includes a reflector 324 reflecting the sound waves so that the position of the reflector 324 is changed by the adjusting apparatus 620 so that the frequency of the sound wave can be adjusted.
  • the adjustment device 620 may include a handle 621 and a pinion gear 622.
  • the pinion gear 622 may be inserted into the housing 610 and the handle 621 may be provided outside the housing 610. By rotating the handle 621, the pinion gear 622 can rotate.
  • the pinion gear 622 can be used to adjust the position of the position adjusting rod 325 by gearing with the position adjusting rod 325 connected to the reflection plate 324 of the first sound absorbing device 320. [ The position of the position adjusting rod 325 is changed by the pinion gear 622 so that the position of the reflection plate 324 in the first sound absorbing device 320 can be changed.
  • the muffler 700 includes a housing 710, sound absorbing devices 721 and 722, and a regulating device 730.
  • the housing 710 may be hollow and communicate with the duct.
  • the sound absorbing devices 721 and 722 are provided inside the housing 710 to reduce noise caused by the fluid introduced into the housing 710.
  • Sound absorbing devices 721 and 722 may include a third sound absorbing device 721 and a fourth sound absorbing device 722.
  • the third sound absorbing device 721 may include a reflection plate 734 to emit a reverse sound having a different frequency.
  • the fourth sound absorbing device 722 may be a Helmholtz resonator.
  • the third sound absorbing device 721 and the fourth sound absorbing device 722 may be integrally formed. And a third sound absorbing device 721 and a fourth sound absorbing device 722 may be provided on one body.
  • the shape and function of the third sound absorbing device 721 and the fourth sound absorbing device 722 are similar to those of the first sound absorbing device 320 and the second sound absorbing device 500 described above, do.
  • the adjustment device 730 may include a handle 731 and a pinion gear 732.
  • the pinion gear 732 may be inserted into the housing 710 and the handle 731 may be provided outside the housing 710. By rotating the knob 731, the pinion gear 732 can rotate.
  • the pinion gear 732 can be used to adjust the position of the position adjusting rod 735 by gearing with the position adjusting rod 735 connected to the reflecting plate 734 of the third sound absorbing device 721. [ The position of the position adjusting rod 735 is changed by the pinion gear 732 so that the position of the reflection plate 734 in the third sound absorbing device 721 can be changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un silencieux et un procédé de maintien et de réparation du silencieux. Ce silencieux comprend : un boîtier creux couplé à une partie de génération de bruit; et un dispositif d'absorption sonore disposé à l'intérieur du boîtier et s'étendant dans la direction de la longueur du boîtier, le dispositif d'absorption sonore comprenant une pluralité d'unités d'absorption sonore couplées les une aux autres dans la direction de la longueur du boîtier et pour réduire le bruit.
PCT/KR2017/010449 2016-09-23 2017-09-22 Silencieux et procédé de maintien et de réparation de silencieux WO2018056739A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780058604.3A CN109790768B (zh) 2016-09-23 2017-09-22 一种消音器及其维护方法
JP2019516220A JP6925415B2 (ja) 2016-09-23 2017-09-22 消音器および前記消音器のメンテナンス方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020160121909A KR101834484B1 (ko) 2016-09-23 2016-09-23 소음기 및 소음기의 유지보수방법
KR10-2016-0121909 2016-09-23
KR10-2017-0111867 2017-09-01
KR1020170111867A KR102027262B1 (ko) 2017-09-01 2017-09-01 소음기 및 상기 소음기의 유지 보수 방법

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WO2018056739A1 true WO2018056739A1 (fr) 2018-03-29

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CN (1) CN109790768B (fr)
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CN109790768A (zh) 2019-05-21
JP2019534414A (ja) 2019-11-28
JP6925415B2 (ja) 2021-08-25

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